The Commercial Importance of Fog Control

Abstract

Geography is no longer taught as a two-dimensional subject, that is, the mere boundaries of certain surface areas. Our school geographies fifty years ago began to describe customs and manners and later chief industries, exports, etc., and so brought in the human factor. We may define geography today as all that pertains to human environment. Are we wrong in suggesting that seismology for instance comes strictly within the purview of the instructor in geography? Is it not important that the class studying social and economic problems of the dwellers in our central southwestern states, should know quite a lot about the oil fields of Texas and Oklahoma. But these are now located mainly by using seismographs and we delve below the surface, although not very far, in interpreting the complex records of the transmitted earth waves due to explosive shocks. And the geographer should not stop with these skin-of-theearth phenomena. My colleague, Professor Reginald A. Daly, in his delightful paper X-Raying the Earth, shows how geology is being remade today and that the geophysicist holds the center of the stage. It is not so much the features of the surface of the earth that we seek to study, as the layers below, even down to the core. Long elastic waves set going when the hammer of the deadly earthquake strikes caught on seismographs at widely separated observatories, bring to light the long hidden secrets of earth's concentric shells. Or again, the sonic depth finder or fathometer, by the echo of sound waves gives the lay-out of ocean bottoms. Surely the Professor of Geography must nolt omit the mention of these. It is then, we agree, entirely appropriate for the geographers to explore downward as well as superficially;' but if he can go down